Product Introduction:
1. The main unit features LED and LCD displays: The main unit uses a Chinese liquid crystal display with menu-based operation, capable of showing date, time, care level, calling bed number, system status, etc.
2. The main unit stores and displays calls; the system multi-functionally displays calls. When an extension calls the main unit, the main unit's LED window displays it. If the main unit does not answer an incoming call from an extension, it stores the extension number and call sequence and provides a prompt.
3. Corridor music display screen: 12 famous Chinese and foreign musical pieces. When an extension calls, the corridor display screen cyclically plays music ringing, and the main unit announces the number verbally.
4. Arbitrary extension number setting: Extensions use online encoding and can be set to any number; includes door lights and bathroom emergency buttons.
5. Uninterrupted calling: The main unit can display calls from multiple extensions and retain memory; extensions can call in normally regardless of whether the main unit is on standby, in a call, or in broadcast mode.
6. Handheld call intercom: Extensions include a handheld caller, capable of calling, canceling calls, and intercom; extension playback is realistic, clear, and distortion-free.
7. Duplex intercom: The main unit and extensions support duplex intercom; the main unit has two call modes: hands-free via telephone and handset.
8. Voice announcement: When an extension calls the main unit, the main unit's LED route selection indicator flashes, music prompts, and a voice announces "Bed number XX is calling"; extensions receive chord music prompts.

9. Call storage: If the main unit does not answer an extension call, it automatically stores the extension number.
10. Three-level care: Based on the patient's condition, the care level can be set on the main unit, with three levels: special care, advanced, and general, indicated by red, green, and yellow lights respectively. Advanced priority applies, with higher care level extensions having priority.
．Three-color door light: The system includes door lights that display three colors and can be linked to extensions. When an extension calls, the door light shows different colors according to the extension's care level.
11. Broadcast function: The main unit can play broadcasts, connect to recorders, MP3 players, and other signal sources to play music or broadcasts. It can broadcast hands-free using the telephone or main unit and simultaneously broadcast to all extensions for education.
12. Caller ID: When an extension calls, the telephone displays the extension's bed number and rings.
13. Group call function: The main unit can call all or some extensions simultaneously and support intercom.
14. Two-wire system networking: All extensions are connected in parallel on the bus without distinguishing positive and negative poles.
15. Volume setting: The main unit can set the prompt volume during calls and the call volume of the main unit; when an extension calls the main unit, it can set two different prompt volumes for day and night with voice prompts.
16. Corridor LED Chinese character display screen: The main unit can connect to an external LED Chinese character liquid crystal display screen, showing calling bed numbers, polite phrases, etc.